Octafluorobutane compositions

Abstract

The present invention includes compositions of octafluorobutane and a compound of the formula C a F b H 2a+2-b , where a=3 or 4 and b=1 to 8 are disclosed. These compositions, which may be azeotropic or azeotrope-like, may be used as refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, aerosol propellants, refrigerants, heat transfer media, gaseous dielectrics, fire extinguishing agents, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, buffing abrasive agents or displacement drying agents.

I claim: 
     
       1. A process for cleaning a solid surface comprising treating said surface with an azeotropic or azeotrope-like composition consisting essentially of: (i) about 20-80 weight percent 1,1,1,2,2,3,3,4-octafluorobutane and 20-80 weight percent 1,1,2,2,3-pentafluoropropane, wherein when the temperature has been adjusted to about 25° C., the vapor pressure is lower than the vapor pressure of the individual components;   (ii) about 10-52 weight percent 1,1,1,2,2,3,3,4-octafluorobutane and 48-90 weight percent 1,1,2,3,3-pentafluoropropane, wherein at about 25° C., the vapor pressure of the composition is lower than the vapor pressure of the individual components;   (iii) about 20-80 weight percent 1,1,1,2,3,4,4,4-octafluorobutane and 20-80 weight percent 1,1,2,2,3-pentafluoropropane, wherein at about 25° C., the vapor pressure of the composition is lower than the vapor pressure of the individual components;   (iv) about 8-52 weight percent 1,1,1,2,3,4,4,4-octafluorobutane and 48-92 weight percent 1,1,2,3,3-pentafluoropropane, wherein at about 25° C., the vapor pressure of the composition is lower than the vapor pressure of the individual components;   (v) about 70-99 weight percent 1,1,1,2,2,4,4,4-octafluorobutane and 1-30 weight percent 1,1,2,2,3-pentafluoropropane, wherein at about 25° C., the vapor pressure of the composition is higher than the vapor pressure of the individual components;   (vi) about 95.5-99 weight percent 1,1,1,2,2,4,4,4-octafluorobutane and 1-4.5 weight percent 1,1,2,3,3-pentafluoropropane, wherein about 25° C., the vapor pressure of the composition is higher than the vapor pressure of the individual components; or   (vii) 20-99 weight percent 1,1,1,2,2,4,4,4-octafluorobutane and 1-80 weight percent 1,1,1,2,3-pentafluoropropane, wherein at about 25° C., the vapor pressure of the composition is higher than the vapor pressure of the individual components.